tofsee | befeb13d03669a0f610ba500df017d7b1c2155d86cc7e985feb439a867851fe0

General

Target

ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
Size

14.3MB
MD5

2d357e20218ecce7a188d34e2163ac1c
SHA1

1a5bf816db5c146b3b685fdb28c3761608fdfef4
SHA256

ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411
SHA512

59d6d72c15003acd59936ad400a1d1d465c1d109e9c7360f14603c709679e1fddabfae87252fbb0829fad05fa668deca594715d4775bb2fa9b04af776a7fb182
SSDEEP

6144:uM0Em6Qk5N3Sccccccccccccccccccccccccccccccccccccccccccccccccccc8:oEma

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4900	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\hrbgqeue\ImagePath = "C:\\Windows\\SysWOW64\\hrbgqeue\\yklfawxu.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe

Deletes itself 1 IoCs

pid	Process
4528	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
772	yklfawxu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 772 set thread context of 4528	772	yklfawxu.exe	106

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2340	sc.exe
4964	sc.exe
2972	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yklfawxu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 1208	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	93
PID 2768 wrote to memory of 1208	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	93
PID 2768 wrote to memory of 1208	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	93
PID 2768 wrote to memory of 1016	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	96
PID 2768 wrote to memory of 1016	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	96
PID 2768 wrote to memory of 1016	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	96
PID 2768 wrote to memory of 2972	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	98
PID 2768 wrote to memory of 2972	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	98
PID 2768 wrote to memory of 2972	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	98
PID 2768 wrote to memory of 2340	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	101
PID 2768 wrote to memory of 2340	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	101
PID 2768 wrote to memory of 2340	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	101
PID 2768 wrote to memory of 4964	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	103
PID 2768 wrote to memory of 4964	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	103
PID 2768 wrote to memory of 4964	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	103
PID 772 wrote to memory of 4528	772	yklfawxu.exe	106
PID 772 wrote to memory of 4528	772	yklfawxu.exe	106
PID 772 wrote to memory of 4528	772	yklfawxu.exe	106
PID 772 wrote to memory of 4528	772	yklfawxu.exe	106
PID 772 wrote to memory of 4528	772	yklfawxu.exe	106
PID 2768 wrote to memory of 4900	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	107
PID 2768 wrote to memory of 4900	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	107
PID 2768 wrote to memory of 4900	2768	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	107

C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hrbgqeue\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yklfawxu.exe" C:\Windows\SysWOW64\hrbgqeue\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1016
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hrbgqeue binPath= "C:\Windows\SysWOW64\hrbgqeue\yklfawxu.exe /d\"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2972
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hrbgqeue "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2340
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hrbgqeue
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4964
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:4900

C:\Windows\SysWOW64\hrbgqeue\yklfawxu.exe
C:\Windows\SysWOW64\hrbgqeue\yklfawxu.exe /d"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:772
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4528

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4404,i,7447299413640964517,4240724842020506306,262144 --variations-seed-version --mojo-platform-channel-handle=1284 /prefetch:8
1⤵
PID:556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\yklfawxu.exe

Filesize
12.0MB

MD5
52b624f0e23d6e7149a94f9a8d470da4

SHA1
b7fbfad1ad5fe38fb741f52ee49714c5d02a3e01

SHA256
c41865ced46b964988d26011becf5c3ec1e10e16cf7b1e3aa432652a3f9291d8

SHA512
aa00233a775b5b13c17af1f241935cd8ecaeeb1a4fb9ae2e4d213c2fd56209b49cabc542fa6b9baa1c5886f34f0fb26069695624d75a7f104a8ea456be88b74c

Download Submit
memory/772-7-0x0000000000570000-0x0000000000571000-memory.dmp

Filesize
4KB

Download
memory/772-12-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2768-0-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/2768-1-0x00000000009D0000-0x00000000009D1000-memory.dmp

Filesize
4KB

Download
memory/2768-2-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2768-13-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4528-8-0x00000000009E0000-0x00000000009F5000-memory.dmp

Filesize
84KB

Download
memory/4528-11-0x00000000009E0000-0x00000000009F5000-memory.dmp

Filesize
84KB

Download
memory/4528-14-0x00000000009E0000-0x00000000009F5000-memory.dmp

Filesize
84KB

Download
memory/4528-15-0x00000000009E0000-0x00000000009F5000-memory.dmp

Filesize
84KB

Download
memory/4528-16-0x00000000009E0000-0x00000000009F5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads